Type your textAssignment#1MMIS 653 (Winter 2020)Total points: 80Questions: (50 points)1.(6 points) Suppose there are exactly two packet switches (switch#1 and switch#2) between a sending host and a receiving host. The transmission rate between the sending host and switch#1 is R1. The transmissions rate between switch#1 and switch#2 and between switch#2 and the receiving host are R2 and R3, respectively. Assuming that the switches use store-and-forward packet switching, what is the total end-to-end delay to send a packet of length L? (Ignore queuing, propagation delay, and processing delay.)2.(10 points)a.How many milliseconds does it take for a packet of length 1,000 bytes to be delivered from the sending host to the receiving host over a link of distance 1,200 km, propagation speed 2.4x108m/s, and transmission rate 10Mbps (consider both transmission delay and propagationdelay)?b.More generally, how long does it take a packet of length L to be delivered from the sending host to the receiving host over a link of distance d, propagating speed s, and transmission rate R bps?c.How many milliseconds does it takefor the first bit of the packet to arrive at the receiving host (start to count the time when the sending host starts to transmit the first bit of thepacket)?d.How many milliseconds does it take for the last bit of the packet to be put on the link (start to count the time when the sending host starts to transmit the first bit of thepacket)?3.(8 points) Suppose Host A wants to send a large file to Host B. The path from Host A to Host B has three links, of rate R1=500kbps, R2=1.5Mbps, and R3=1Mbps.a.Assume no other traffic in the network, what is the throughput for the filetransfer?b.Suppose the file is 5MB (Assume 1MB= 106bytes). Dividing the file size by the throughput, roughly how long will it take to transfer the file to HostB?4.Suppose users share a 2Mbps link. Also suppose each user requires 500kbps when transmitting, but each user transmits only 10% of the time. (See the discussion of packet switching versus circuit switching in Section 1.3)a.(1 point) When circuit switching is used, how many users can be supported?

b.(2 points) For the remainder of this problem, suppose packet switching is used. Find the probability that a giving user is transmitting.c.(3 points) Suppose there are 5 users, find the probability that at any given time, all 5 users are transmitting simultaneously. What is the probability that there are 4 or less users transmitting simultaneously?5.(4 points) What information is used by a process running on one host to identifya process running on anotherhost?6.(8 points) For the following (a-d) state whether the statement is True or False?Explainwhy.a.A user requests a Web page that consists of some text and one image. For this page, the client will send one request message and receive one response message.b.Two distinct Web pages (for example, https://www.nova.edu/resources/current-students.htmland https://www.nova.edu/resources/faculty-staff.html) can be sent over the same persistent connection.c.With persistent connections between browser and origin server, it is possible for a single TCP segment to carry two distinct HTTP request messages.d.The Date: header in the HTTP response message indicates the time and date when the HTTP response was last modified.7.(8 points) What is an application-layer message? A transport-layer segment? A network-layer datagram? A link-layer frame?Wireshark Lab: HTTP (30 points)Wireshark Lab -HTTP: Answer question 1-15 in this lab. (2 points each)For the Wireshark Lab questions, you should show me where you obtained your answers. The following paragraph is taken from the Lab assignment:”By looking at the information in the HTTP GET and response messages, answer the following questions. When answering the following questions, you should print out the GET and response messages (see the introductory Wireshark lab for an explanation of how to do this) and indicate where in the message you’ve found the information that answers the following questions. When you hand in your assignment, annotate the output so that it’s clear where in the output you’re getting the information for your answer (e.g., for our classes, we ask that students markup paper copies with a pen, or annotate electronic copies with text in a colored font